TOYOTA PRIUS 2001 Service Repair Manual

2001 PRIUS (EWD414U)
P1 PARK/NEUTRAL POSITION SW
4±1 : Closed with the shift lever at R position
B5 BACK±UP LIGHT RELAY
3±5 : Closed with the shift lever at R position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A736H14D37J31B38
B536J1137J32A38
B836J1737J33B38
C10A36J1837N239
C11B36J2237P137
E9C36J2437R639
E10D36J27A37R739
G137J28B37
H13E37J30A38
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
2A
2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D
2K31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IF142Instrument Panel Wire and Floor Wire (Left Kick Panel)
IJ144Floor No.3 Wire and Instrument Panel Wire (Under the Instrument Panel Center)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LH
IG42Cowl Side Panel RH
IH42Right Kick Panel
BI46Left Side of Rear Pillar
BK46Back Panel Center
SERVICE HINTS

2001 PRIUS (EWD414U)
LIGHT AUTO TURN OFF
120A MAIN
1B 1C1
D 11B 1130A
HEAD
1 2
32 41
1F 823 15
7. 5A
TAI L FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
2K 62H 1
B 2B11ID2 2 IA2 6
ID2 3
B 17 B18
IG ID2 5ID262K 1
B F
A D
IB1 3
1
ID 2C 9
B 11 2
B A
A A
2D 8
2K 8 B
16 7
EB 6
E
13 14
AA 17 R±W R±WW
B W B±G
LG LGR±G R±G R±G R±G R±W R
LG±R R
LG±R W±B
R±W R±W R±W
W±B
W± B W±B W±BL±B L±B
L±B
2
(
*1) (
*1) (
*1)
R±W
(
*2)
(
*2)
(
*2) (
*1)H H±LP
TAI L REL AY HEAD RELAYSHORT PIN
JUNCTION
CONNECTOR J20DAYTIME RUNNING
LIGHT RELAY D 3
JUNCTION
CONNECTOR J27
UNLOCK WARNING SW U 1
OFF
TAI L
HEAD
100A DC/DC
FUSIBLE LINK
BLOCK NO. 2 F1 8
FUSIBLE LINK
BLOCK NO. 1C F11 B , F1 2
JUNCTION
CONNECTORB J12 A , J13
JUNCTION CONNECTORB J24 A , J25
DOOR COURTESY
SW FRONT LH D 6
JUNCTION
CONNECTOR J17LIGHT CONTROL SW
[COMB. SW] C13
JUNCTION
CONNECTOR J11
D , F13
BATTERY12
3* 1 : W/ DAYTIME RUNNING LIGHT
* 2 : W/O DAYTIME RUNNING LIGHT (
*1)
(
*2)
(
*2)
(
*1)
7. 5A
ECU±B
2C 5
F
F
B 9
BODY ECUB 9 B
R±G R±G
10A
GAUGE
15
H T DCTY E HRLY TRLY TAIL IG B KSW

2001 PRIUS (EWD414U)
With the ignition SW turned on, the current flows to TERMINAL 15 of the body ECU through GAUGE fuse.
Voltage is applied at all times to TERMINAL (A) 11 of the body ECU through the TAIL relay. Coil side, and to TERMINAL (A)
2 through the HEAD relay coil side (w/o daytime running light) or through the daytime running light relay (w/ daytime running
light).
1. NORMAL LIGHTING OPERATION

With the light control SW turned to TAIL position, a signal is input into TERMINAL (A) 18 of the body ECU. Due to this signal,
the current flowing to TERMINAL (A) 11 of the body ECU flows to TERMINAL (A) 18 to TERMINAL 14 of the light control SW
to TERMINAL 16 to GROUND, and taillight relay causes taillights to turn on.

With the light control SW turned to HEAD position, a signal is input into TERMINALS (A) 17 and (A) 18 of the body ECU. Due
to this signal, the current flowing to TERMINAL (A) 2 of the body ECU flows to TERMINAL (A) 17 to TERMINAL 13 of the
light control SW to TERMINAL 16 to GROUND in the headlight circuit, and causes taillight and HEAD relay to turn the lights
on. The taillight circuit is same as above.
2. LIGHT AUTO TURN OFF OPERATION
With light on and ignition SW turned off (Input signal goes to TERMINAL 15 of the body ECU), when the driver's door is
opened (Input signal goes to TERMINAL 3 of the body ECU), the ECU operates and the current is cut off which flows from
TERMINAL (A) 11 of the body ECU to TERMINAL (A) 18 in taillight circuit and from TERMINAL (A) 2 to TERMINAL (A) 17 in
headlight circuit.
As a result, all lights are turned off automatically.
HEAD RELAY
2±1 : Closed with the light control SW at HEAD position or the dimmer SW at FLASH position
Closed with the engine running and the parking brake lever released (Parking brake SW off) [w/ daytime running light]
TAIL RELAY
3±5 : Closed with the light control SW at TAIL or HEAD position
D6 DOOR COURTESY SW LH
1±GROUND : Continuity with the front LH door open
B8 (A), B9 (B) BODY ECU
15±GROUND : Approx. 12 volts with the ignition SW at ON position
3±GROUND : Continuity with the front LH door open
(B) 9±GROUND : Always approx. 12 volts
(A) 1±GROUND : Always continuity
(A) 2±GROUND : Continuity with the light control SW at HEAD position
(A)11±GROUND : Continuity with the light control SW at TAIL or HEAD position
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
B9B36F13D34J2037
C1336F1838J24A37
D336J1137J25B37
D638J12A37J2737
F11B34J13B37U137
F12C34J1737
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1B27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)1F27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2D30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2H31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2K31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
SYSTEM OUTLINE
SERVICE HINTS

2001 PRIUS (EWD414U)
LIGHT AUTO TURN OFF
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IA242Engine Room Main Wire and Cowl Wire (Cowl Side Panel LH)
IB142Floor Wire and Cowl Wire (Cowl Side Panel LH)
ID242Instrument Panel Wire and Cowl Wire (Left Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LH
IG42Cowl Side Panel RH

2001 PRIUS (EWD414U)
MEMO

2001 PRIUS (EWD414U)
INTERIOR LIGHT
15A
DOME FROM POWER SOURCE SYSTEM (
SEE PAGE 50)
1J 7
2G 2
2N 3
B DBD A EAE 2A4
2 1
BI1 2
B E
A D
112
OFF
ON DOOR
2N 12L62K32K1
11A 12
11B F
A D
IB1 3ID2 13
ID A 16 A 15
BA 13 11
3 6 74
14
BAGR ±B GR ±BL±Y
MPX2 MPD2
PCTY L±Y
L±Y
GR±B GR±L GR GR±B
R±W R±W R±WR±W R±W R±WR R±GR±B R±BL±Y
L±Y L±Y
R±W R±WW±B W± BL±Y L±Y
MPD1
MPX1
MPX+ MPX±BODY ECUB 8 A JUNCTION
CONNECTORB J30 , J31AGATEWAY
ECU G 1
ENGINE CONTROL
MODULE E10
JUNCTION
CONNECTOR J33
PERSONAL LIGHT P 5
INTERIOR LIGHT I16LUGGAGE
COMPARTMENT
LIGHT L 5
DOOR COURTESY SW
REAR LH D 8
DOOR COURTESY SW
REAR RH D 9
DOOR COURTESY SW
FRONT LH D 6
DOOR COURTESY SW
FRONT RH D 7
JUNCTION
CONNECTOR J16LUGGAGE
COMPARTMENT
LIGHT SW L 6
JUNCTION CONNECTORB J12 A , J13 JUNCTION CONNECTORB J30 A , J31
A DA 14
IF1 4
R±W
R±W R±W
LCTY
A
JUNCTION
CONNECTOR J11 9B
R±G
7. 5A
ECU±B
2C 5
F F
R±G
JUNCTION
CONNECTOR J27
FROM POWER SOURCE
SYSTEM (
SEE PAGE 50)
B , B 9
B 1
W±B
E DCTY RCTY LPB
2K 82D 8
W±B

2001 PRIUS (EWD414U)
B 3B2A21
A 14
2B 62A 7 114 GR±B GR±BL±Y
MPX+
GR GR±B
GR±B
L±Y L BR
MP2+
A/C
AMPLIFIER A 7
COMBINATION METERB C10 , C11A
DOOR
IH

2001 PRIUS (EWD414U)
INTERIOR LIGHT
B8 (A), B9 (B) BODY ECU
3±GROUND : Continuity with front LH door open
6±GROUND : Continuity with rear LH, RH door open
(A)14±GROUND : Continuity with front RH door open
(B) 9±GROUND : Always approx. 12 volts
L6 LUGGAGE COMPARTMENT LIGHT SW
1±GROUND : Closed with the luggage compartment door open
: PARTS LOCATION
CodeSee PageCodeSee PageCodeSee Page
A736D938J2737
B8A36E1036J30A38
B9B36G137J31B38
C10A36I1638J3338
C11B36J1137L538
D638J12A37L638
D738J13B37P539
D838J1637
: JUNCTION BLOCK AND WIRE HARNESS CONNECTOR
CodeSee PageJunction Block and Wire Harness (Connector Location)
1J27Engine Room Main Wire and Engine Room J/B (Engine Compartment Left)
2A
2B30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)2C30Instrument Panel Wire and Instrument Panel J/B (Cowl Side Panel LH)
2D
2G31Engine Room Main Wire and Instrument Panel J/B (Cowl Side Panel LH)
2K31Cowl Wire and Instrument Panel J/B (Cowl Side Panel LH)
2L31Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)2N31Floor Wire and Instrument Panel J/B (Cowl Side Panel LH)
: CONNECTOR JOINING WIRE HARNESS AND WIRE HARNESS
CodeSee PageJoining Wire Harness and Wire Harness (Connector Location)
IB142Floor Wire and Cowl Wire (Cowl Side Panel LH)
ID242Instrument Panel Wire and Cowl Wire (Left Kick Panel)
IF142Instrument Panel Wire and Floor Wire (Left Kick Panel)
: GROUND POINTS
CodeSee PageGround Points Location
ID42Cowl Side Panel LH
IH42Right Kick Panel
BI46Left Side of Rear Pillar
SERVICE HINTS

2001 PRIUS (EWD414U)
MEMO

2001 PRIUS (EWD414U)
MULTIPLEX COMMUNICATION SYSTEM (COMMUNICATION BUS)
MPX1 MPX2
ENGINE
CONTROL
MODULE E10
MPD1 MPD2
GATEWAY
ECU G 1
MP2+ MPX+
A/C AMPLIFIER A 7 MPX± MPX+
COMBINATION
METER C11 MPX+ MPX±
BODY ECU B 8
GR GR±B
GR
GR±B 4 1415
3
4 11 1316
2
11
GR±L